Php image watermark code, php image adding text watermark and image watermark-php Tutorial

Php image watermark code, php image adding text watermark and image watermark

/** * Watermarks: Supports the transparency settings of text image watermarks and the transparency of the watermark image background. * Usage: (php text watermark effect) * $ Obj = new WaterMask ($ imgFileName); // instantiate an object * $ Obj-> $ waterType = 1; // type: 0 indicates a text watermark, and 1 indicates an image watermark. * $ Obj-> $ transparent = 45; // watermark transparency * $ Obj-> $ waterStr = 'bbs .it-home.org '; // watermark text * $ Obj-> $ fontSize = 16; // text font size * $ Obj-> $ fontColor = array (255, 0255); // watermark text color (RGB) * $ Obj-> $ fontFile = 'ahgbold. ttf'; // font file * $ Obj-> output (); // The output watermark image file overwrites the input image file. */ Class WaterMask { Public $ waterType = 1; // watermark type: 0 indicates a text watermark, and 1 indicates an image watermark. Public $ pos = 0; // Watermark Position Public $ transparent = 45; // watermark transparency Public $ waterStr = 'bbs .it-home.org '; // watermark text Public $ fontSize = 16; // text font size Public $ fontColor = array (255, 0, 255); // watermark text color (RGB) Public $ fontFile = 'ahgbold. ttf'; // font file Public $ waterImg = 'logo.png '; // watermark image Private $ srcImg = ''; // image to which a watermark is to be added Private $ im = ''; // Image handle Private $ water_im = ''; // watermark image handle Private $ srcImg_info = ''; // picture information Private $ waterImg_info = ''; // watermark image information Private $ str_w = ''; // watermark text width Private $ str_h = ''; // watermark text height Private $ x = ''; // watermark X coordinate Private $ y = ''; // y coordinate of the watermark Function _ construct ($ img) {// destructor $ This-> srcImg = file_exists ($ img )? $ Img: die ('"'. $ img. '" source file does not exist! '); } Private function imginfo () {// obtain the information of the image to which the watermark is to be added and load the image. $ This-> srcImg_info = getimagesize ($ this-> srcImg ); Switch ($ this-> srcImg_info [2]) { Case 3: $ This-> im = imagecreatefrompng ($ this-> srcImg ); Break 1; Case 2: $ This-> im = imagecreatefromjpeg ($ this-> srcImg ); Break 1; Case 1: $ This-> im = imagecreatefromgif ($ this-> srcImg ); Break 1; Default: Die ('original image ('. $ this-> srcImg.') format is incorrect. only PNG, JPEG, and GIF images are supported. '); } } Private function waterimginfo () {// Obtain the watermark image information and load the image. $ This-> waterImg_info = getimagesize ($ this-> waterImg ); Switch ($ this-> waterImg_info [2]) { Case 3: $ This-> water_im = imagecreatefrompng ($ this-> waterImg ); Break 1; Case 2: $ This-> water_im = imagecreatefromjpeg ($ this-> waterImg ); Break 1; Case 1: $ This-> water_im = imagecreatefromgif ($ this-> waterImg ); Break 1; Default: Die ('watermark image ('. $ this-> srcImg.') format is incorrect. only PNG, JPEG, and GIF images are supported. '); } } Private function waterpos () {// watermark position algorithm Switch ($ this-> pos ){ Case 0: // random position $ This-> x = rand (0, $ this-> srcImg_info [0]-$ this-> waterImg_info [0]); $ This-> y = rand (0, $ this-> srcImg_info [1]-$ this-> waterImg_info [1]); Break 1; Case 1: // upper left $ This-> x = 0; $ This-> y = 0; Break 1; Case 2: // upper $ This-> x = ($ this-> srcImg_info [0]-$ this-> waterImg_info [0])/2; $ This-> y = 0; Break 1; Case 3: // upper right $ This-> x = $ this-> srcImg_info [0]-$ this-> waterImg_info [0]; $ This-> y = 0; Break 1; Case 4: // center left $ This-> x = 0; $ This-> y = ($ this-> srcImg_info [1]-$ this-> waterImg_info [1])/2; Break 1; Case 5: // Medium $ This-> x = ($ this-> srcImg_info [0]-$ this-> waterImg_info [0])/2; $ This-> y = ($ this-> srcImg_info [1]-$ this-> waterImg_info [1])/2; Break 1; Case 6: // right $ This-> x = $ this-> srcImg_info [0]-$ this-> waterImg_info [0]; $ This-> y = ($ this-> srcImg_info [1]-$ this-> waterImg_info [1])/2; Break 1; Case 7: // bottom left $ This-> x = 0; $ This-> y = $ this-> srcImg_info [1]-$ this-> waterImg_info [1]; Break 1; Case 8: // bottom $ This-> x = ($ this-> srcImg_info [0]-$ this-> waterImg_info [0])/2; $ This-> y = $ this-> srcImg_info [1]-$ this-> waterImg_info [1]; Break 1; Default: // bottom right $ This-> x = $ this-> srcImg_info [0]-$ this-> waterImg_info [0]; $ This-> y = $ this-> srcImg_info [1]-$ this-> waterImg_info [1]; Break 1; } } Private function waterimg (){ If ($ this-> srcImg_info [0] <= $ this-> waterImg_info [0] | $ this-> srcImg_info [1] <= $ this-> waterImg_info [1]) { Die ('watermark is larger than the source image! '); } $ This-> waterpos (); $ Cut = imagecreatetruecolor ($ this-> waterImg_info [0], $ this-> waterImg_info [1]); Imagecopy ($ cut, $ this-> im, 0, 0, $ this-> x, $ this-> y, $ this-> waterImg_info [0], $ this-> waterImg_info [1]); $ Pct = $ this-> transparent; Imagecopy ($ cut, $ this-> water_im, 0, 0, 0, $ this-> waterImg_info [0], $ this-> waterImg_info [1]); Imagecopymerge ($ this-> im, $ cut, $ this-> x, $ this-> y, 0, 0, $ this-> waterImg_info [0], $ this-> waterImg_info [1], $ pct ); } Private function waterstr (){ $ Rect = imagettfbbox ($ this-> fontSize, 0, $ this-> fontFile, $ this-> waterStr ); $ W = abs ($ rect [2]-$ rect [6]); $ H = abs ($ rect [3]-$ rect [7]); $ FontHeight = $ this-> fontSize; $ This-> water_im = imagecreatetruecolor ($ w, $ h ); Imagealphablending ($ this-> water_im, false ); Imagesavealpha ($ this-> water_im, true ); $ White_alpha = imagecolorallocatealpha ($ this-> water_im, 255,255,255,127 ); Imagefill ($ this-> water_im, 0, 0, $ white_alpha ); $ Color = imagecolorallocate ($ this-> water_im, $ this-> fontColor [0], $ this-> fontColor [1], $ this-> fontColor [2]); Imagettftext ($ this-> water_im, $ this-> fontSize, 0, 0, $ this-> fontSize, $ color, $ this-> fontFile, $ this-> waterStr ); $ This-> waterImg_info = array (0 => $ w, 1 => $ h ); $ This-> waterimg (); } Function output (){ $ This-> imginfo (); If ($ this-> waterType = 0 ){ $ This-> waterstr (); } Else { $ This-> waterimginfo (); $ This-> waterimg (); } Switch ($ this-> srcImg_info [2]) { Case 3: Imagepng ($ this-> im, $ this-> srcImg ); Break 1; Case 2: Imagejpeg ($ this-> im, $ this-> srcImg ); Break 1; Case 1: Imagegif ($ this-> im, $ this-> srcImg ); Break 1; Default: Die ('failed to add watermark! '); Break; } Imagedestroy ($ this-> im ); Imagedestroy ($ this-> water_im ); } } ?>